Answer:0.29
Step-by-step explanation:
An average of six cell phone thefts is reported in San Francisco per day. This means our mean value, u = 6
For poisson distribution,
P(x=r) = (e^-u×u^r)/r!
probability that four cell phones will be reported stolen tomorrow=
P(x=4)= (e^-6×6^4)/4!
= (0.00248×1296)/4×3×2×1
= 3.21408/24=
0.13392
P(x=5)= (e^-6×6^5)/5!
= (0.00248×7776)/5×4×3×2×1
= 19.28448/120
= 0.1607
probability that four or five cell phones will be reported stolen tomorrow
= P(x=4) + P(x=5)
= 0.13392 + 0.1607
= 0.294624
Approximately 0.29
Silvia has to score a 101 to get an average of 90 for all four tests.
Explanation: 90=(86+81+92+x)/4
360=259+x
101=x
Answer:
(an -a1)/d +1 = n
Step-by-step explanation:
Undo what is done to n, in reverse order. When evaluating this expression, you ...
- subtract 1 from n
- multiply the difference by d
- add a1
When you undo these, you get ...
... an -a1 = d(n-1) . . . . . . subtract a1
... (an -a1)/d = n - 1 . . . . divide by d
... (an -a1)/d +1 = n . . . . add 1
_____
<em>Comment on answer list</em>
Please note the use of parentheses in the answer here. These identify that the difference (an -a1) is what is divided by d. None of the offered answers has these parentheses, nor are they typeset in a way that would indicate the intent to divide (an -a1) by d. As given, none of the offered answers is correct.
This is solve for x
Step-by-step explanation:
To find you may:
-3/2< -3/2➡️swap the sides
3 x > - 3/2➡️divide both sides
<h2>
Answer: x > - 1/2</h2>
Basically, the problem is asking us to take 2.20, the length of AB, and work with it through the problem. Well, we are first told that the original polygon is reflected across the x-axis to form the polygon A'B'C'D'E'. This does nothing to the length of AB, so we can move onto the next given section. We are given that A'B'C'D'E' is dilated by a factor of 0.5 (1/2) to form the polygon LMNOP. Here, we will have to take 2.20, the original length, and divide it by 0.5, to get the length of LM. When we perform the operation, we get 1.10, or 1.1. Therefore, the length of LM is 1.10 units. Hope this helped and have a great day!
